package org.set;

import java.util.HashSet;

public class set {
    public static void main(String[] args) {
        HashSet<Object> set = new HashSet<>();
        System.out.println(set.add("wsq"));
        System.out.println(set.add("wsq"));
        set.add("zzz");
        set.add("sss");
        set.add("aaa");
        System.out.println(set);
    }
}
